Screw-gear for gun-sight devices, &amp;c.



PATENTED MAY 28, 1907.

0. GRAUHBRING. SCREW GEAR FOR GUN SIGHT DEVICES, 8w.

APPLICATION FILED APR.9, 1906.

To all whom it my concern: i V

.Be itknown that I, -OSKAR Gaauuunme, a

: vention is to improve such gears.

, 3 such a manner that while the gun remains of the telescope carrier.

' .OSKAR GRAUHERING, F s -RfiT'lfnnsonnm, GERMANY; ASSIGNOR To -3W GESELLSCHAFL or ESsEN-o JHiaRUHB,

MANY.

subject of the Emperor of Germany, and a resident of Essen-Riittenscheid, Germany,

have invented certain new and useful Imrovements in Screw-Gears for Gun-,S' ht evices and theLike, of which'theipllownig is a specification.

The present inventionrelates to adjusting.

gears in particular screw ears for gun sight devichs and the llke, and t e object of the inthe accompanying drawing, the invention is, by way'of example, shown applied to a telescope-.sightingattachment provided with a screw-gear for the lateral adjustnnent Figure 1- is a rear view of a part of the attachment. Fig. 2 isia section on line 22, Fig. 1, looking from the left andlwith'the telescope omitted. Fig. 3 is'a top view of Fig. 2, partly in'section on line 3-3'. 4 is a section on line 4*4, 3, looking up. wardly, 'and'Fig. 5 is a part of 2 with changed position of some of-theparts. Figs. 2 to 5 are on an enlarged scale. Y I

Theto of the attachment bar'A isv pro:- vided with a head B rigidly secured thereto. The carrier C' for the sight telescope'D 1) is rotatably connected with the head1B, 1n

stationary, the telescope may bc directed at anytarget (auxiliary target) located the circumference of the gun. The turmng of. the telescope carrier 0 is accomplished-by means of a screw Ef journaled in the telescope shaft is formed by a- "sleeve,- or ho b (Fig. 5) when the carrier and engaging with a toothed crown b ontheheadB. 3

The shaft E of the screw E is provided with a hand-wheel e and the bearingforwthhe whichis rotat-ably and non-slidably arranged in a hearing 0 in the telescope carrier C.

The sleeve is provided with a cut-away portion f (Figs. 2, .3'and 5) for the crown 6 The-bores of the bearings in-th'e sleeve F,

which are provided for'the shaft'E are lo cated eccentrica'lly to the bores of the bearing a in such a-mann'er'that the screw E can ementwith the teeth be brought out ofenga sleeve F isturned approximately 90. The relative arrangement r f-sc w-eE' R-Foa GUN-SIGHT Devices. as.

st am Hayes, 1907.

is indicate byd-fl in Fig. 2) does'not'coincidewith the. plane of the pitch'circle of. the teeth b but is coated at an angle of. approximanner that, when the screw E engages with the teeth b (Figs. and 3), the plane, which. contains theturning axis of'the' screw E and a the t of the sleeve-F (which plane mately 45- thereto; By reason of' this 'ar .rangement, the screw E, can Zbehrought that is to-say, the wor gear can be changed so that there'will he no nearer to the teeth 71 by-turning the sleeve F, l

kmg positions of the pla when the enga 'ng-faces'of the screw E am ,of thetecth b ecomeworn. .The. part of the sleeveF which is adjacentto the hand wheel e is of mushroom-shape and 'forms with a fia'nge c of thebearing 0 a housing which is closed on sides and in which is" arranged a spiral spring J One and"? (Fig.

4):of-the s rmgJ e es with'a. ro'ection '0 (see also Fig. 3) di t-h P 1 other end 'iFis 'secui'edin'the'wall f hou The sp slelevle h w 1c 1; e screw ',e es handle fnn the vides for convenient turning' ii" the sleeve F.

of the e bearing 0 and the JQtendsto hold the. and the screw the position in theteeth b of the housing {pro- When the parts are in thepositionimost clearlyshown' in-j Figs; 2 and 3 in'whic'h the screw E engages the teeth'b the telesco e" can be adjusted'through-the' mediumoft e- 'hand wheel a. If a'conside'rable angular ad. -justment is tobe imparted to the telescope,

the operator-turns the" handle and the sleeve F against theaction" of the spri-ng J inthe directionof the arrow :1; 2) into the osition shown Fig. 5, inwhichthe screw E is out of engagement with the teeth 6 10f;

the head B, andthe telescope may then be i- I done, the handle f isrelea sed and the spring J thereupon returns the screw E into engage-I roughly adjusted directly by hand This adjustment'of the telescope maybe effected by turning-the hand-wheel e I When the engaging faces of the adjusting roo 'deviceE, 6 gradually become worn during the use-of the device, the spring Jgnakes up therefor by turning the sleeve F'cofrespondingly-in the opposite direction ofthe arrow-a thereby bringln teeth 6 j The a eve-described construction,

the screw-E nearer to the of the parts is furthermore selected in such a therefore, provides for a continuous working -ol" the gear without play and conse uently provides f or' an exact adJuStment of t 1e telesco )e. e

he device for disengaging the screw E from the teeth I) moreover permits a very compact construction of the several parts and provides for a dust-proof casing for the gear E 6" through the medium of the telesco wit the carrier.

Having described my invention what I claim as new is 1. In an adjusting gear, the combination of a ear,.a rotatable housing, a second gear mem r rotatably and eccentrically mounted in the housing, and means automatically returning the second gear to the first named gear when the housing is released.

2. In an adjusting means, the combina tion of a gear member, a rotatable housing, a

. second gear member rotatably and eccentric-. ally mounted in the housing, and a spring tending to rotate the housing to'keep the second gear member in engagement with the first-named gear member.

3. In an adjusting means, the combination of a gear member, a rotatable housing, a

second gear member rotatably and eccentrically mounted in the housing, and a spring tending to rotate the housing to keep the second gear member in enga ement with the first-named gear member; t e plane passing through the axes of the second gear member and the housin being located at an angle to the plane of the first-named gearmember when the gear members are in engagement with each other.

' 4. In an adjusting means for sight devices,

carrier 0 and the bearing 0 integral amped ed in the si ht device and a second gear member rotata ly and eccentrically mounted inthe housing and means tending to rotate the housing to hold the second gear member in eng ement with the fixed gear member.

6 11 an adjusting means for sight devices, the combination with the attachment bar provided with a fixed gear member and the sight device rotatably mounted on the attachment bar, of a housing rotatably mounted in the si ht device, a screw eccentrically and rotatab y mounted in said housing,- and means tending to rotate the housing to hold the screw in engagement with the fixed gear member; the plane passing through the axes of the screw and of'the housing being located at an angle to the plane of the gear member {)vhen the screw engages with the gear memer. v The foregoing specification si ne'd at Diisseldorf, this twenty-sixth day of March, 1906.

OSKAR GRAUHERING.

In presence of WILLIAM ESSENWEIN, CARL GBUNWALD. 

